Everytime i run an intensive task be it IO or CPU on the guest the entire machine hangs. I’ve stress tested hardware stability already on the host but when i start a game server or run prime 95 on the windows server guest, the entire machine hangs. I’ve tried changing various things to virto IO, threaded disk with no cache, including reducing the number of CPU threads for the guest but it still hangs when the physical CPU is fully used. Is there a way to put the guest CPU priority lower than host? I have encountered similar issues in the past where if i ran stress-ng on the host as root it would cause the machine to hang regardless of hardware setting but running it as user doesnt cause it to hang.
However KVM is run as root so whenever something intensive runs the whole thing hangs. I’ve never yet seen it survive a prolonged peak CPU or IO usage.
While virtualbox tends to be more stable, i need the memory performance.